Table 2.

List of taxonomic groups that were significantly increased/decreased in multiple studies.

Taxa	Increased in Schizophrenia	Decreased in Schizophrenia
Phylum: Firmicutes	Castro-Nallar et al., 2015 (Oral) [34]	Shen et al., 2018 [40]
Phylum: Proteobacteria	Shen et al., 2018 [40] Ma et al., 2020 (vs HC only) [43] Zhang et al., 2020 (FSCZ) [36]	Nguyen et al., 2019 [41]
Class: Deltaproteobacteria	Xu et al., 2020 [44] Zhang et al., 2020 (FSCZ) [36]
Order: Actinomycetales	Xu et al., 2020 [44] Zhang et al., 2020 (FSCZ) [36]
Order: Clostridiales	He et al., 2018 (High-risk for SCZ) [33]	Shen et al., 2018 [40]
Family: Enterobacteriaceae	Shen et al., 2018 [40] Ma et al., 2020 (vs. HC only) [43]	Zheng et al., 2019 [42]
Family: Enterococcaceae	Ma et al., 2020 [43]	Xu et al., 2020 [44]
Family: Lactobacillaceae	Shen et al., 2018 [40] Ma et al., 2020 [43]
Family: Lachnospiraceae		Shen et al., 2018 [40] Zheng et al., 2019 [42] Zhang et al., 2020 (FSCZ) [36]
Family: Prevotellaceae	Shen et al., 2018 [40] Zheng et al., 2019 [42]
Family: Rikenellaceae	Zheng et al., 2019	Xu et al., 2020 [44]
Family: Veillonellaceae	Shen et al., 2018 [40] Zheng et al., 2019 [42] Ma et al., 2020 (vs. FSCZ only) [43]
Genus: Acidaminococcus	Shen et al., 2018 [40] Zhu et al., 2020 (FSCZ) [38]
Genus: Akkermansia	Zheng et al., 2019 [42] Zhu et al., 2020 (FSCZ) [38]
Genus: Anaerotruncus	Zhang et al., 2020 (FSCZ) [36] Zhu et al., 2020 (FSCZ) [38]
Genus: Bifidobacterium	Castro-Nallar et al., 2015 (Oral) [34] Zhu et al., 2020 (FSCZ) [38]	Yuan et al., 2018 (FSCZ) [37]
Genus: Blautia	Nguyen et al., 2019 [41] Zhang et al., 2020 (FSCZ) [36]	Shen et al., 2018 [40] Zheng et al., 2019 [42]
Genus: Citrobacter	Shen et al., 2018 [40] Ma et al., 2020 (vs. FSCZ only) [43] Zhu et al., 2020 (FSCZ) [38]	Zheng et al., 2019 [42]
Genus: Clostridium	Shen et al., 2018 [40] Ma et al., 2020 (vs. FSCZ only) [43]
Genus: Coprobacillus	Ma et al., 2020 (vs. HC only) [43] Zhu et al., 2020 (FSCZ) [38]
Genus: Coprococcus	Zhang et al., 2020 (FSCZ) [36]	Shen et al., 2018 [40] Zheng et al., 2019 [42]
Genus: Eggerthella	Xu et al., 2020 [44] Zhang et al., 2020 (FSCZ) [36]
Genus: Enterococcus	Ma et al., 2020 [43] Zhu et al., 2020 (FSCZ) [38]	Xu et al., 2020 [44]
Genus: Fusobacterium	Shen et al., 2018 [40] Zheng et al., 2019 [42] Ma et al., 2020 (vs. FSCZ only) [43]
Genus: Lactobacillus	Castro-Nallar et al., 2015 (Oral) [34] He et al., 2018 (High-risk for SCZ) [33] Shen et al., 2018 [40] Ma et al., 2020 [43] Zhu et al., 2020 (FSCZ) [38]	Yuan et al., 2018 (FSCZ) [37]
Genus: Megasphaera	Shen et al., 2018 [40] Nguyen et al., 2019 [41] Zheng et al., 2019 [42] Ma et al., 2020 (vs. FSCZ only) [43] Xu et al., 2020 [44]
Genus: Prevotella	He et al., 2018 (High-risk for SCZ) [33] Shen et al., 2018 [40] Zheng et al., 2019 [42] Zhang et al., 2020 (FSCZ) [36]	Yolken et al., 2020 (Oral) [35]
Genus: Ruminococcus	Nguyen et al., 2019 [41] Ma et al., 2020 (vs. FSCZ only) [43]	Zhang et al., 2020 (FSCZ) [36]
Genus: Streptococcus	Ma et al., 2020 [43] Yolken et al., 2020 (Oral) [35]	Shen et al., 2018 [40]
Genus: Veillonella	Ma et al., 2020 [43] Zhu et al., 2020 (FSCZ) [38]
Species: Akkermansia muciniphila	Xu et al., 2020 [44] Zhu et al., 2020 (vs. HC only) [38]
Species: Bacteroides eggerthii		Shen et al., 2018 [40] Zheng et al., 2019 [42]
Species: Bifidobacterium adolescentis	Shen et al., 2018 [40] Xu et al., 2020 [44] Zhu et al., 2020 (vs. HC only) [38]
Species: Escherichia coli	Zhu et al., 2020 (vs. FSCZ only) [38]	Yuan et al., 2018 (FSCZ) [37]
Species: Eubacterium hallii	Castro-Nallar et al., 2015 (Oral) [34]	Zhu et al., 2020 (vs FSCZ only) [38]
Species: Lactobacillus gasseri	Castro-Nallar et al., 2015 (Oral) [34] Xu et al., 2020 [44]
Species: Lactobacillus ruminis	He et al., 2019 (High-risk for SCZ) [33] Zhu et al., 2020 (vs. HC only) [38]	Zhu et al., 2020 (vs FSCZ) [38]
Species: Lactobacillus salivarius	Castro-Nallar et al., 2015 (Oral) [34] Zhu et al., 2020 (vs. HC only) [38]
Species: Haemophilus parainfluenzae		Nguyen et al., 2019 [41] Zheng et al., 2019 [42]